Home / 2,986.30-4,121.67-1,808.38

Finding the Fourth Proportional to 2,986.30, 4,121.67 and 1,808.38

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Solution

The fourth proportional to 2,986.30, 4,121.67 and 1,808.38 is: 2,495.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.30 : 4,121.67 = 1,808.38 : x
  2. Step 2: Convert to fraction form
    2,986.30/4,121.67 = 1,808.38/x
  3. Step 3: Cross multiply
    2,986.30x = 4,121.67 × 1,808.38
  4. Step 4: Simplify right side
    2,986.30x = 7,453,545.59
  5. Step 5: Solve for x
    x = 7,453,545.59/2,986.30
  6. Step 6: Final answer
    x = 2,495.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.